Imagine making a typo in the receiving address
Yeah. It seems silly to perform this transaction all at once. The size of this transaction magnifies the consequences of any sort of error and attracts what I'm guessing is very unwanted attention.
If you’re a whale and want to someday liquidate this, ideally at higher value, you want the world to see big things like this. It will remind people that bitcoin network is still very much alive despite the repeated death sentences made by supposed financial experts.